Improvement in steam-engine cylinders



2 Sheets-Sheet 2.

H. P. FRISB IE, Steam-"Engine Cylinder.

No. 198,099. Patented Dec. 11,1877.

INVENTOR gag/masses I ATTORNEYS NJFYERS. PNOTO-LITHOGRAPHER. WASHINGTON.D C.

UNITED STATES PATENT OFFICE.

HAMLIN F. FRISBIE, OF DANVILLE, ILLINOIS.

IMPROVEMENT IN STEAM-ENGINE CYLINDERS.

Specific'ationfornnng part of Letters Patent No. 198,099, dated December11, 1877; application filed December 1, 1877.

To all whom it may concern:

Be it known thatI, HAMLIN F. FRISBIE, of Danville, in the county ofVermillion and in the State of Illinois, have invented certain new anduseful Improvements in Steam-Engine Cylinders; and do hereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanyto which my invention appertains tomake and use the same, I will now proceed to describe its constructionand operation, referring to the annexed drawings, in which Figure 1 is atransverse section through the end of the cylinder. Fig. 2 is alongitudinal section of the same, and Fig. 3 is a detailed view of thevalve.

A represents a portion of the steam-cylinderat the end, and B is thehead thereof. At each end the cylinder A is formed with a surroundingjacket, O, which leaves a steam-chamber, a, entirely surrounding the endof the cylinder. The end of the cylinder A is cut away next to the headB, or close to the head, so as to form a nearly continuous passage, 0,from the steam-chamber a into the cylinder, whereby the steam isadmitted at one time into the cylinder almost over its entire area,instead of at one point only, and thereby making the actioninstantaneous.

The jacket'O is formed with two valvechests, E and E, constructedexactly alike, and containing the valves G and G, respectively, one

being for inlet and the other for exhaust, so that the description ofone will answer for both.

The chest E is formed with an annular valveseat, 0, below thesteam-inlet H, upon which seat the valve G rests. This valve is madecylindrical, and fits around a cylindrical head, L, projecting from thecover J of the chest. In this head is a circumferential groove, withsuitable packing-rings d d placed therein to form tight joints with thevalve.

The two inlet-valves at opposite ends of the cylinder are, of course,connected by suitable mechanism and operated alternately. In like mannerthe two exhaust-valves G are operated for the same purpose.

My invention i s particularly intended for low"- pressure engines, butcan also be used for hi ghpressure engines, the main object beingtoadmit the steam at one time over the entire area of the cylinder andpiston.

The valve-chests and valves may be located at any point desired, eithertop, bottom, or sides.

To the construction of the valve I, however, lay no claim in thisapplication, as I shall make the same the subject of a separate ap-.plication.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

A steam-cylinder provided at each end with a surrounding-jacket, O,forming a continuous steam-chamber, a, with a passage, 1), from saidchamber into the cylinder, extending nearly around the end thereof, toadmit of an instan' taneous ingress and egress of steam, each jacketbeing provided with an inlet and an outlet chest having valves therein,substan tiallyas herein set forth.

. In testimony that I claim have hereunto set my hand this "1st day ofDecember, 1877.

H. F. FRISBIE.

Witnesses v FRANK GALT, H. AUBREY ToULMIN.

the foregoing I

